Magazine tack hammer



INVENTOH (LT-MC CORMCK ATTORNEY March 25 1924.

C. T. MCCORMICK MAGAZINE TA K HAMMER Filed May 4. 1922 Patented Mar. 25, 1224i.

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MAGAZINE TACK HAMFEER.

Application filed May 4, 1922.

To all whom it may concern:

Be it known that I, CYRUs T. MCCORMICK,

a citizen of the United States of America,

residing at the city of Fredericktown, s county of Madison, State of Missouri,

United States of America, have invented a certain new and useful Magazine Tack Hammer, of which the following is such a full, clear, and exact description as will 10 enable anyone skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a magazine tack l hammer and has for its object the production of a hammer which may be used in the same manner as an ordinary hammer to start the tacks and may also be reversed to complete the driving of the tack.

In the accompanying drawings which illustrate one form of hammer made in accordance with my invention, Figure 1 is a side view, one half of the casing being removed, Figure 2 is an enlarged section 25 taken on the line 2-2 of Figure 1, Figure 3 is a section taken on the line 3-3 of Figure 2, Figure 4 is an enlarged view of the hammer head, similar to Figure 1, but show-v ing the parts in a different position, Figure 5 is a section on the line 55 of Fig ure 4, and Figures 6 and 7 are enlarged vertical sections oflthe lower end of the impact plunger.

The body of the hammer, including both handle and head, is composed of two parts 10 and 11 secured together by means of rivets 12. These parts 10 and 11 are formed by stamping, casting or forging and are similar in outline but vary somewhat in cross section as clearly shown in Figure 2 of the drawings. The handle of the hammer is hollow to provide a tack magazine and the upper portion of said handle is provided with a pair of oppositely disposed grooves 13 to form the receptacle for the heads of the tacks 14. These grooves 13 are so proportioned as to cause the tacks when in position in the magazine to stand at an angle as clearly shown in Figure 1. The inner end of the tack magazine curves downwardly as it joins the head portion of the hammer so as to present the tacks in the proper position to the starting plunger as will be hereinafter more fully described.

ti e) Serial No. 558,438.

Secured in the upper end of the head by means of rivets 15 is a plug 16 of hardened steel which provides a striking face for completing the driving of the tacks after they have been started by the use of the opposite end of the hammer head.

Arranged in line with the plug 16 is an impact plunger 17. This plunger 17 is provided at its upper end with a collar 18 against which bears one end of a coil spring 19. The other end of the coil spring 19, which serves to hold the plunger 17 against the plug 16, as shown in Figure 1, is supported by a collar 20 which collar also forms a guide for the lower end of the plunger. Extending below the body of the plunger 17 is a portion 21, the lower end of which is adapted to come in contact with the head of the tack to be driven. The inner face of the lower end of the part 21 is cut away to form a shoulder 22 for feeding a second tack into position to be engaged by the end of the portion 21 after the preceding tack has been driven. In order to hold the tack in position below the end of the part 21, I provide a pair of pivotal detents 23. Each of these detents 23 is provided with an upwardly and inwardly projecting tail piece 24;, the ends of which are adapted to move into guide slots 25 having inclined lower ends as shown in Figures 6 and 7. A pair of inclined guide plates 26 serve to guide the tack into position upon the upper faces of the dents 23 as said tack is fed downwardly by the shoulder 22. 27 are thin retaining springs which are secured to the upper inner face of the part 10 of the handle, the object of these springs being to prevent the retrograde movement of the tacks. The tacks are fed into the magazine through an opening 28 adjacent to the rear end of the handle.

The operation of my device is as follows: The tacks are fed into the magazine through the opening 28 and the hammer turned in such position as to allow the tacks to slide down toward the head by gravity. It will of course be necessary to place sufilcient tacks in the magazine to fill the same from the head to the first spring 27. The hammer may now be used in the manner of an ordinary hammer, the small end of the head being brought against any suitable surface as for instance the card A (Figure at) resting against a surface B to which it is to be attached when the small end of the hammer strikes the surface A the impact of the blow will cause the plunger 17 to move against the tension of the spring 19 so as to start the tack 14 as shown in Figure 4c and at the same time to feed the next succeeding tack downwardly by means of the offset 22 until the head of the tack is brought close to the inclined plates 26. The plunger 17 is immediately returned by the spring 19 so that the tack lat which has been fed downwardly by the shoulder 22 may be guided by the plates 26 on to the upper faces of the dctents 23. These detents should be so proportioned as to close as soon as they have reached the position shown in Figure 7 of the drawings and thus prevent the possibility of a tack escaping between them before the next stroke of the plunger. The plunger, however, should rise somewhat higher as shown in Figure 1 so as to allow sufficient rooinfor the tack to move freely under the end of the plunger. It is to be noted that the depth of the offset 22 should not be greater than one-half of the diameter of the tack head plus the diameter of the tack body, otherwise two tacks might be engaged by the said offset at one time thus causing the device to 3' am. 7

Having fully described my invention what 1 claim as new and desire to secure by Lettcrs Patent of the United States is:

1. In a device of the class described, the combination with a hammer head, of a handle having fixed relation substantially at right angles to said head and forming a tack magazine, said magazine being curved at the point of junction with the head, and an impact actuated plunger movable relative to the head and crossing the line of tack feed at an acute angle thereto to start the tacks.

2. In a device of the class described, the combination with a hammer head, of a han dle fixed with relation to said head and forming a tack magazine, and an impact actuated plunger movable relative to the head to seat the tacks, said plunger having an ofiset for moving a tack into position to be acted upon by the end of the plunger.

3. In a device of the class described, the combination with a hammer head, of a handle fixed with relation to said head and forming a tack magazine, an impact actuated p'uugcr provided with an offset movable rel ative to said head to seat the tacks, a pair of pivotal detents for holding and releasing the tack, and an inclined guide adjacent to said offset for delivering the tack to said detents.

In testimony whereof, I have hereunto set my hand and aflixed my seal.

C. T. MGOQRMICK. [11. s] 

